A correlation for predicting diffusion coefficients in alkanes
A correlation for predicting diffusion coefficients in alkanes
复制标题
预测烷烃扩散系数的相关性
DOI：
10.1002/cjce.5450680418
复制
发表时间：
1990
影响因子：
2.1
通讯作者：
A. Akgerman
中科院分区：
文献类型：
--
作者：
C. Erkey;J. Rodden;A. Akgerman
建立了一个关系式，用于预测碳数为7 ~ 28的正构烷烃溶剂中气态和液态溶质在温度至570k时的极限相互扩散系数。关联度的函数形式基于粗糙硬球理论。关联中需要的参数是溶质分子和溶剂分子的分子量、硬球直径和溶剂的摩尔体积。用于建立相关性的数据包括143个测量值，溶质/溶剂分子质量比范围为0.005至2.26，尺寸比范围为0.3至1.3。预测的平均绝对误差仅为6.3%。当用相关性预测二元正构烷烃体系的文献值时，平均绝对误差为16.7%。
A correlation was developed for predicting limiting mutual diffusion coefficients of gaseous and liquid solutes in normal alkane solvents with carbon numbers ranging from 7 to 28 at temperatures to 570 K. The functional form of the correlation is based on the rough hard sphere theory. The parameters needed in the correlation are the molecular weights and hard sphere diameters of the solute and solvent molecules and molar volume of the solvent. The data used in the development of the correlation included 143 measurements with solute/solvent molecular mass ratios ranging from 0.005 to 2.26 and size ratios ranging from 0.3 to 1.3. The average absolute error in predictions was only 6.3%. When the correlation was used to predict literature values for binary n-alkane systems, the average absolute error was 16.7%.